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Posted: 12/14/2013 6:14:40 PM EST
Hi Guys,

This may be a fairly basic question but what size transformer would I need to power 8 charging cradles that all take 12.5v DC input?

the craddles output 8volts at 400-450MA
Link Posted: 12/14/2013 6:21:39 PM EST
Need more info. Are you trying to reduce voltage from 12.5v to 8v. You cannot transform DC you would need a resistor.
Link Posted: 12/14/2013 6:28:38 PM EST
I want to Lower voltage from 220Volts (main power) Down to feed 8 Charging Craddles for HT's, each craddle is supposed to be fed 12.5 volts DC.

The craddle themselves output to the HT 8.5~volts and 400-450Ma.

Instead of having each craddle with its own 12 volt transformer/power supply I want to have all 8 with one mains power supply so it will only take up one wall socket.
Link Posted: 12/14/2013 6:32:10 PM EST
What is the ratings off the current power supply to the cradle?


A Transformer is an AC device so you need More than just
a transformer to build your power supply for the cradles



Link Posted: 12/14/2013 6:32:54 PM EST
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By Laryisgary:
I want to Lower voltage from 220Volts (main power) Down to feed 8 Charging Craddles for HT's, each craddle is supposed to be fed 12.5 volts DC.

The craddle themselves output to the HT 8.5~volts and 400-450Ma.

Instead of having each craddle with its own 12 volt transformer/power supply I want to have all 8 with one mains power supply so it will only take up one wall socket.
View Quote



Why are you using 220???

Link Posted: 12/14/2013 6:36:55 PM EST
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By Laryisgary:
I want to Lower voltage from 220Volts (main power)
View Quote


220 volts is one of them-there euro-pee-on commie voltages.

Are you sure you're actually located in Texas, rather than Lichtenstein, Luxembourg, or some other country with a gay-sounding name?
Link Posted: 12/14/2013 6:37:57 PM EST
Sorry, Forgot to mention not inside the states atm.

Using 230-40 AC here.

The current output is 12V DC 1000Ma
Link Posted: 12/14/2013 6:39:19 PM EST
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By Mr_Harry:
What is the ratings off the current power supply to the cradle?
View Quote


Ding ding. Multiply by ten and there's your answer.

If you wanted to get real pretty, a properly sized switching power supply (betting that a 10-15A output will be more than sufficient) and then a 10-plug RigRunner...
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